CN201581862U - Dropping-prevention by-pass valve assembly - Google Patents
Dropping-prevention by-pass valve assembly Download PDFInfo
- Publication number
- CN201581862U CN201581862U CN2010200132277U CN201020013227U CN201581862U CN 201581862 U CN201581862 U CN 201581862U CN 2010200132277 U CN2010200132277 U CN 2010200132277U CN 201020013227 U CN201020013227 U CN 201020013227U CN 201581862 U CN201581862 U CN 201581862U
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- valve
- dropping
- prevention
- valve body
- lost
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Abstract
The utility model discloses a dropping-prevention by-pass valve assembly which comprises a valve body, a valve core mounted in the inner chamber of the valve body, a valve seat, a spring and a filter sleeve arranged on the wall of the valve body in a position corresponding to the through-hole of the valve core, and further comprises a dropping-prevention rod, a dropping-prevention nut and a dropping-prevention ring. A valve housing, the valve core and the dropping-prevention nut are mounted in the by-pass valve through the female buckle end, and the dropping-prevention rod is arranged in the cavity at the male buckle end of the valve body; and the dropping-prevention ring is further arranged on the inner wall at the top end of the male buckle end. The dropping-prevention by-pass valve assembly and a motor are in direct connection, and the threaded connection structure of the by-pass valve and the dropping-prevention part is eliminated, so that the incidence of a screw drill tool dropping into a pit bottom during production is greatly reduced; and the valve core and the valve seat are mounted into the valve body from the female buckle end, so that the wall thickness at the male buckle end is increased, the dimension of the dropping-prevention by-pass valve is shortened, and both material and cost are saved.
Description
Technical field
The utility model relates to the drilling equipment field, relates in particular to a kind of anti-lost by-pass valve assembly.
Background technology
Need use a large amount of helicoid hydraulic motors in the oil and natural gas industry.Helicoid hydraulic motor is by four most of compositions, and they are respectively by-pass valve assembly, motor assembly, universal drive shaft assembly and driving-shaft assembly.By-pass valve assembly is assemblied at helicoid hydraulic motor topmost, and its effect at first is to connect drill collar or centralizer sub, its two be when drilling mud band baric flow during through the bypass valve endoporus, the bypass spool is descending closes, mud all is used for work of drive screw drilling tool and circulation; After slush pump cut out, bypass spool up one-tenth under the effect of spring was opened shape, carried on drilling tool in the process, and the mud in the drilling tool is discharged by sieve aperture and entered in the well.In recent years, the continuous generation of well accident because drilling tool falls has increased anti-lost part in some design, is connected between by-pass valve assembly and the motor assembly, prevents that drilling tool motor etc. from partly falling into the shaft bottom.But because the design space is limited, anti-lost body wall is thin, and screw strength is poor, and anti-lost body ruptures easily, and the motor well that partly falls causes drilling failure.Bypass valve and anti-lost body are processed separately on the other hand, and finished product needs aggregate erection, has reduced production efficiency, and the materials increase also causes processing cost to raise.
The utility model content
For solving the problems of the technologies described above, the utility model provides a kind of anti-lost by-pass valve assembly, on bypass valve original function basis, has increased the anti-lost function of drilling tool, has improved the safety factor in using, and saves materials, and processing is enhanced productivity easily.
For realizing above-mentioned technical purpose, the utility model is achieved through the following technical solutions: anti-lost by-pass valve assembly, comprise valve body, be installed in the spool of body cavity, on valve seat and spring and the valve body wall with the filter ruffle and the anti-lost nut of valve core through hole opposite position, against falling bar, drop-proof loop, the pin end internal diameter of valve body is littler than valve pocket and valve core diameter, the box end internal diameter is bigger slightly than valve pocket and valve core diameter, being valve pocket and spool packs in the by-pass valve body by box end, body cavity inner spool one end is provided with centring ring, limit the valve core movement scope, centring ring limits the position by dog screw, the pin end outer wall of valve body is provided with screw thread, the against falling bar that is provided with anti-lost nut in the chamber and is connected with anti-lost nut thread, also be provided with drop-proof loop on the top inwall of pin end in addition, the internal diameter of drop-proof loop is littler than the diameter of anti-lost nut.
Compare with conventional art, the utlity model has following beneficial effect: anti-lost by-pass valve assembly directly is connected with motor, bypass valve and anti-lost body screw connection structure have been reduced, reduced the drop incidence in shaft bottom of helicoid hydraulic motor in the drilling process greatly, spool and valve seat are packed in the box end of valve body, and then shortened the size of anti-lost by-pass valve body, and save material, be convenient to processing.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is a structural representation of the present utility model.
Among the figure, 1, valve body, 2, dog screw, 3, centring ring, 4, spool, 5, filter ruffle, 6, spring, 7, valve seat, 8, anti-lost nut, 9, against falling bar, 10, drop-proof loop.
The specific embodiment
Referring to accompanying drawing, valve body 1 is cylindric, inside is the cavity of hollow, valve body 1 upper end is a box end, the lower end is a pin end, box end one side internal diameter is bigger, valve seat 7 and spool 4 so that pack into, pin end one side internal diameter is littler than the diameter of valve seat 7, limits the position of valve seat 7 in valve body 1 chamber by the endoporus step, is provided with centring ring 3 in valve body 1 chamber in spool 4 outsides, centring ring 3 limits scope of activities by the set screw 2 that is fixed on the valve body 1, centring ring 3 limits the range of movement of spool 4, and the periphery of spool 4 and valve seat 7 is provided with spring 6, and valve body 1 wall is provided with the filter ruffle 5 with spool 4 through hole opposite positions.The against falling bar 9 that is provided with anti-lost nut 8 in the chamber and is threaded with anti-lost nut 8, the top inwall of pin end is provided with drop-proof loop 10, the internal diameter of drop-proof loop 10 is littler than the diameter of anti-lost nut 8, the pin end outer wall of valve body 1 is provided with screw thread, so that be connected with motor assembly, the box end inwall of valve body 1 is provided with screw thread, so that connect other drilling tools.
Claims (1)
1. anti-lost by-pass valve assembly, by valve body, be installed in the spool of body cavity, filter ruffle with the valve core through hole opposite position on valve seat and spring and the valve body wall constitutes, it is characterized in that also being provided with in the valve body anti-lost nut, against falling bar, drop-proof loop, the pin end internal diameter of valve body is littler than valve pocket and valve core diameter, the box end internal diameter is bigger than valve pocket and valve core diameter, valve pocket and spool are packed into by box end in the by-pass valve body, body cavity inner spool one end is provided with centring ring, centring ring limits the position by dog screw, the pin end outer wall of valve body is provided with screw thread, anti-lost nut and the against falling bar that is connected with anti-lost nut thread are arranged in the valve body chamber, drop-proof loop is arranged on the top inwall of pin end, and the internal diameter of drop-proof loop is littler than the diameter of anti-lost nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200132277U CN201581862U (en) | 2010-01-04 | 2010-01-04 | Dropping-prevention by-pass valve assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200132277U CN201581862U (en) | 2010-01-04 | 2010-01-04 | Dropping-prevention by-pass valve assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201581862U true CN201581862U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200132277U Expired - Fee Related CN201581862U (en) | 2010-01-04 | 2010-01-04 | Dropping-prevention by-pass valve assembly |
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| Country | Link |
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| CN (1) | CN201581862U (en) |
Cited By (35)
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| CN103437730A (en) * | 2013-08-29 | 2013-12-11 | 成都科盛石油科技有限公司 | Bypass valve with anti-dropping structure |
| CN103835679A (en) * | 2014-03-24 | 2014-06-04 | 盐城市大冈石油工具厂有限责任公司 | Multifunctional screw drill tool bypass valve |
| CN108019170A (en) * | 2017-12-21 | 2018-05-11 | 天津立林石油机械有限公司 | Safety valve |
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2010
- 2010-01-04 CN CN2010200132277U patent/CN201581862U/en not_active Expired - Fee Related
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